/awt"n uyt', oh tun"uyt/ , n.
a yellow mineral, a hydrous calcium uranium phosphate, CaU 2 P 2 O 12 ·8H 2 O, occurring in crystals as nearly square tablets: a minor ore of uranium.
[ 1850-55; named after Autun, city in E France near source of supply; see -ITE 1 ]